Semi-Solid Reaction Product Novolac Epoxy Resin Hwr-638 of Good Adhesion Strength, Excellent Heat and Chemical Resistance

• Customization: Available
• Environmental Protection: Yes
• Appearance: Liquid
• Model NO.: Novolac Epoxy Resin HWR-638
• Color: Yellowish, Transparent, Semi-Solid
• Epoxy Equivalent (G/Mol): 174-180
• Color (Gardner): ≤1
• Chloride Content (Ppm): ≤5
• Hydrolyzable Content (Ppm): ≤300
• Volatile Matter (Ppm): ≤500
• Transport Package: Drum
• Specification: 220kg in iron drum
• Trademark: Honrepoxy
• Origin: China
• HS Code: 3907300090
• Production Capacity: 90000tons Per Year

Product Description

Product Description

Novolac Epoxy Resin 638 is a semi-solid reaction product of epichlorohydrin and phenol-formaldehyde novolac. It has advantageous characteristics of good adhesion strength, excellent heat and chemical resistance because of its multi-functional groups in one molecule fully cross-linked. Therefore, it has excellent physical properties in addition to the basic reactivity of general Epoxy Resin.

 

Characteristic:

• High viscosity

• High temperature resistance

• Chemical resistance

• Good adhesion strength

• High mechanical strength

Typical applications:

• Heat resistant adhesives

• Heat resistant Coatings

• Laminates

• Composite

• PCB inks

• Potting and Encapsulation

The physical and chemical propertie:

Item	Specification
Volatile matter (ppm)	≤500
Hydrolyzable Content (ppm)	≤300
Color, (Gardner)	≤1
Chloride Content (ppm)	≤5
Epoxy Equivalent,g/mol	174-180
Appearance	Yellowish, Transparent, Semi-solid
Viscosity(cps,25°C)	H-K

Storage, Handling and Packaging:

Novolac Epoxy Resin 638 is supplied in bulk or in 220KG tight-head drums. The resin should be stored in dry place in its original closed packaging. Shelf life is 12 months.

 

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